Spring-scale.



JAENICHEN.

SPRING SCALE! APPUCATION FILED OCT-8,1913.

Patented Feb. 22, 1916.

3 SHEETSSHEET I.

' 4 7 OR/1 E V L. JAENIICHEN:

SPRING SCALE.

APPLICATION FILED OCT. 8, 1913.

Patented Feb, 22, 1916.

3 SHEETSSHEET 2.

l/VVf/VTOR 6L2 \W5 is cw w'whz w @120 By pi TTORIVEV WITNESSES:

5;. AENlCH-EN- SPRING SCALE.

ABRLICATION FILED ocT. 8. 1913.

Patented Feb. 22, 191i 3 SHETS-SHEET 3.

W/ T/l/ESSES LOUIS JAENIGHEN, F DETROIT,

MICHIGAN, ASSIGNOR TO STANDARD. COMPUTING SCALE COMPANY, LIMITED, 015 DETROIT, MICHIGAN, A LIMITED PARTNERSHIP.

sramesennn.

Specification. of Letters Patent. Batented Feb. 22, 1916.

Application filed October 8, 1913. Serial No. 794,084.

To all whom it may concern:

Be it known that I, LOUIS JAnNIoHEN, a citizen of the U-"1ed States, and a resident of Detroit, in tile county of Wayne and State of Michigan, have invented a new and useful Spring-Scale, of which the following is a specification.

This invention relates to scales provided with weight indicators wherein the effect of the load on the levers is resisted by means of springs, and its object is to provide a scale wherein the normal deflections of the weight indicator when the scale is unloaded because of changes of temperature will be compensated, and wherein the indicator will move equal distances for equal increments of load.

This invention consists, in combination withthe base and a weighing lever pivoted thereon intermediate its ends, of a load receiver engaging one arm of the lever, and a pair of alined springs, normally under tension and having their adjacent ends connected to the other arm of said lever.

It also consists, in combination with the elements set forth, of a pivotally mounted indicator, of a pair of drums concentric with the pivot of the indicator, '2. flexible connector passing around one of the drums and connecting to theweighing lever, and a second flexible connector passingaround the second drum and serving to return the indicator to normal position by the aid of a ring.

' It further consists in forming the drum to x which the lever is connected smaller than the other.

It further consists in the novel details of construction shown in the drawings and especially pointed out in the claims.

In the accompanying drawings, Figure 1 is an elevation-of this improved scale. Fig. 2 is an elevation. of the upper part of the scale with the front of the case removed, to-

ether with a vertical section of the base.

ig. 3 is a vertical section of the front part of the base on a larger scale. 'Fig. 4 is a detail of the connection between the lever i and indicator. Figs. 5 and 6 are details of the indicator pivot. Fig. 7 is a plan of the weighing lever. Figs. 8 and 9 are details of the connection between the springs and Figs. 10 and 11 are details of the cam for adjusting the indicator. Similar reference characters refer to like parts throughout the several views.

will preferably have Fig. 3.

On the base 1 of this scale is mounted a pedestal 2, having arms 3 which support the main pivots 4 of the weighing lever 5. A load receiver is supported on the pivots 6 of this lever, and in the present case consists of a spider 7, a plate 8, anda downwardly extending post 9 that connects to a cross bar 10 of the scale base by means of a link 11. The lever 5 has two laterally extending arms 13 and .14, which support the beam 15 on which the poise 16 is slidable.

The base may carry a dash pot 1'7, while a rod 18 and piston 19 for the dash pot may connect to the weighing lever. A pivot 20, on the end of the arm 21. of the weighing lever, carries the normallyunloaded pendant 22. A weight 24 is normally supported by the lever 25 which is pivoted on the rod. 26 that extends across the base. A second rod 27 also extends across the base and has a cam 28 secured to it in such a'manner that the cam will engage the lever 25. A handle 29 on the outer end of this rod permits the operator to turn the cam 28 and permit the lever 25 to drop sufliciently to place the weight 24 on the pendant This weight the same effect as the movement of the poise 16 to the left or inner end of the beam 15. It is preferably formed with pivots 30 so that it will always be properly positioned, and is normally held up away from the pendant, as shown in Mounted on the base is a case 35, having an apertured front 33 secured in position by screws 34. A dial 32 within the case may be graduated in any desired manner. Within the case is mounted a small frame, consisting of the main or rear bar 36 and front bar 37 both furnished with thimbles 38 in which are men ted the balls 39 that constitute the bearings for the pivot shaft 40; The ends of this pivot shaft are preferably pointed, and screws 41 engaging these points prevent endwise movement of the pivot without sensibly retarding them.

Secured to the pivot shaft are the drums 42 and 43, preferably integral, and to them,

7 is secured theplate 44 carrying the indiscrew 7 8 attaches the The effect of the load placed on the plate 8 is resisted by a spring 50 that connects at its lower end to a cross bar 51 extending across the base, by means of a rod 52, on the lower end of which is a nut 53, so that the initial height of the pivot 54 can be pre determined. The upper end of this spring screws into a cap 55 provided with a pair of fingers 56 that fit between the convolutions of the spring, as shown in Figs. 8 and 9. This cap, as well as the cap 57, screws onto the threaded cylindrical projections 58 of the small housing 59. This cap 57 also has fingers 56. Mounted in this housing is a small block 60 of agate or other hard material, held in position by means of a clip 61. A second spring 62 extends upwardly from the lever 5 andconnects to a small lever 63, pivoted at 6th on an arm 65 that ex tends upwardly from the front bar 37 of the bracket just described. Extending upwardly from the front bar 37 is a small housing 66 in which is mounted a cam, which is more clearly shown in Figs. 10 and 11, and which consists of two cylindrical heads 67 and 68 united by means of an eccentric cylindrical portion 69. v 67 may be formed with a nick 70 so that this cam can be turned by means of a screwdriver inserted through a hole 72v in the front plate of the case,'as shown in Fig. 1.

The length and stiffness of the springs 5 0 and 62 are the same, and when the scale is assembled as shown in the drawings, these two springs are under tension. When it is desired to move the indicator toward the right or left, the cam is turned so as to raise or lower respectively the lever 63, thereby raising or lowering respectively the pivot 54 on the main lever of the scale. Suchmove ment of the upper end of the spring .62 will have a tendency to change the tension of both of the springs to a similar degree, and will therefore have no efiect on the action of these springs with respect to a load placed on the platform 8. An arm 73 may extend from the back of the case and furnish the support for a hook 74 to which is connected a spring 75, as shown in Fig. 2. To the lower .end of this spring a flexible connector 76 is attached, which connector is preferably a very thin ribbon of steel whose lower'end is secured {to the drum 43 by means of a screw'TZ. A

upperend of the flexible connector 79 to the drum 42, as shown in Fig. 5. As shown in Fig. 4:, the lower end of this connector is attached to. a sleeve 80, which sleeve screws onto a bolt 81 carried by the yoke 83. A rod 84 extends from the arm 21 of the main scale lever and carries a downwardly extending pivot .pin 85 that enters a depression 86 in the lower cross bar of the yoke 83. A red 88 is slidably mounted in this yoke 83 'andcan be raised so as to The head permit the pivot 85 entering thechamber in this yoke, but after the pin is positioned, this rod is permitted to slide down so as to .pre-

vent displacement, and a screw 89 may be employed to hold this rod in position.

The graduated scale 90 of the dial-plate is preferably graduated for as many pounds or divisions of weight as is the beam 15, and

the highest characters of each of these pref- I necessary to indicate the load on the plat.-

form 8. This indicator is compelled to turn by means of the spring 175.

The two springs 50 and 62 being of equal length and stiffness, changes in temperature will have the same effect on both, and as they will vary equally under such changes, the position of the indicator will not be affected thereby, so that when this indicator has been set to zero by means of the adjusting device shown in Fig. 10, and its action on the lever 63, the indicator will remain at zero throughout all .the different changes in temperature, so long as the scale is unloaded. Whenever a weight is placed on the platform 8 at the temperature at which the scale is sealed, it will cause a certain upward pressure of the pivot 54 upon the block .59 of agate, and together with the pull ,of the spring 62, heretofore counterbalanced, will cause the spring 50 to extend. When this same weight is placed upon this platform at lower temperatures than that at which the scale was sealed, the upward pressure of the pivot 54 will be met by a stiffer spring 50 but will be assisted by a stifier spring '62. As a result, the changes of temperature which usually aflect the springs of spring scales, will not have the same effect upon the present construction. double drums 42 and 48 on the shaft of the indicator, the movement of the indicator will always be in direct proportion to the. movement of the main weighing lever of the scale, and by reason of the larger drum 43, the movement of the very active spring '75 is permitted to'be comparatively great for this type of scale.

-Aside from the connection between the yoke 83 and the pivot 85, the construction of the base, the lever 5 and the load receiver forms no part of the present invention. Neither does the indicator chart nor the ease of the springs 50 and 62 with the of the main lever,

By means of .the

for the upper end of the spring 62 and in the pivotshaft and its drums 42 and 43 and the connections between said drums and the main weighing lever and with the spring 75. The details of construction of this scale may all be changed by those skilled in the art without departing from the spirit of my invention.

I claim.

1. In a scale, the combination of a base a main weighing lever mounted intermediate its ends on the base, a load receiver connected to one arm of the lever, a pivot extending from the opposite arm, a housing mounted on the pivot and having a bearing engaging the pivot and cups at opposite ends of the housing, said cups having inwardly extending fingers at their edges alined vertical springs extending in opposite directions from said housing, means to secure the lower end of the lower spring, adjustable meansto secure the upper end of the upper spring comprising an arm and an eccentric to position said arm, and an indicator connected to said lever. I

2. In a scale, the combination of a base, a.

main weighing lever mounted intermediate its ends'on the base, a load receiver connected to one arm of the lever, a pivot extending from the opposite arm, a housing mounted on the pivot and having a bearing engaging the pivot, alined vertical springs extending in opposite dirctions from sald housing, means to secure the lower end of the lower spring, adjustable means to secure the upperendof the upper spring comprising an arm and an eccentric to position said arm, and an indicator connected to said lever.

3. In a scale, the combination of a base, a main weighing lever mounted intermediate its ends on the base, a load receiver connected to one arm of the lever, a pivot extending from the opposite arm, a housing mounted on the pivot and having a bearing engaging the pivot and cups at opposite ends of the housing, said cups having inwardly extending fingers at their edges, alined vertical springs extending in opposite directions from said housing, means to secure the lower end of the lower spring,

and the upper end of the upper spring, and

an indicator connected to said lever.

4. In. a scale, the combination of a base, a main weighing lever mounted thereon, a pair of alined springsextending in opposite directions from said lever, means to secure the outer end of one of said springs comprising an arm and an eccentric to position said arm, means to secure the outer end of the other spring, and an indicator connected to said lever.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

LOUIS JAENICHEN.

VVitnesses:

EDWARD N. PAGELSEN, HUGO W. Krmmnnnveq 

